Improvement in fire-proof shutters



a. F. KISSAM.

-Firef-Proof Shutters. Nb.164,566 Patentedlunel5,l875.

WITNESSES IJVV'EJV'TOR (Mfg v I g g /fiidwnfi By I THE GRAPHICCO.PHUTO-LITH.39&.4I PARK PLACEJLY.

GEORGE F. KISSAM, OF NEW YORK,

PATENT ()rr'ron.

N. Y, ASSIGNOR TO-J. 1). KISSAM, or

SAME PLACE.

IMPROVEMENT IN FIRE-PROOF SHUTTERS.

Specification forming part of Letters Patent No. 164,566, dated June 15,1875; application filed May 22, 1875.

To all whom it may concern Be it known that I, GEORGE F. KISSAM, of NewYork, in the county of New York and State of New York, have invented anew and valuable Improvement in Fire-Proof Shutter; and I do herebydeclare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had totheannexed drawings, making a part of this specification, and to theletters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of a side view of myinvention. Fig. 2 is a sectional view of the same.

This invention has relation to that class of shutters and doors in whicha plate of corrugated metal is used in connection with a plain ornon-corrugated sheet of metal.

Previous to my invention such class of shutters possessed no provisionagainst the buckling or distortion of the plain sheet when drawn to itsplace, and, in order to secure the requisite strength and stiffness,necessitated the employment of two plates inclosing a corrugated platebetween them or with a surrounding frame. Shutters constructed accordvin g to this method have been cumbrous, heavy,

and unsightly, as well as very expensive, and it is, therefore, thepurpose of my invention to remove these objections and produce a shutterat a greatly-reduced price, and one possessing greater strength anddurability, and so constructed that the parts sh all mutually strengtheneach other, and thereby dispense with the use of a frame or of doubleplain plates, and that the single plain'plate employed may be readilydrawn to and fixed in its place without buckling or distortion,heretofore commonly incurred.

The invention, therefore, consists in a sh n tter or door composed of acorrugated plate and a plain flat plate, the two constituting theopposite sides of the shutter or door firmly joined by parallel rows ofrivets arranged within the longitudinal grooves or depressions of thecorrugated plate, whereby the desired result is accomplished.

This invention further consists-in closing the top of the corrugationswith an angle-bar and the openings at-the lower end with a flange formedby turning over the lower edge of the flat plate, as will be hereinaftermore fully set forth.

In the drawings, A is designed to represent a corrugated plate of metalsecured to a flat plate, B. In the process of connecting them togetherthe eorrugated'plateA is first placed upon the flat plate B, with thecorrugations extending lengthwise, after which holes are punched by anysuitable machinery through the two plates, where they touch or mostnearly approach each other in the grooves or depressions between theridges or corrugations of the plate A. In these holes suitable rivets aare placed, and commencing along one edge of the plate,,as thusarranged, the rows of rivets are headed or closed down in succession.The close contact of the two plates in parallel lines along the rows ofrivets, the rigidity given to the said rows by the relative shortness ofthe rivets required in thus joining the plates, and the fact that, inaddition to its own inherent strength, each ridge or corrugation of thesheet B is made to act as a strengthening-rib to the plate A, render theshutter thus constructed sufficiently strong, rigid, and permanent forall the exigencies of actual use, and at the same time the manner ofriveting longitudinally with the corrugations effectually takes out whatis technically known as buckle, the corrugated sheet being so muchstiffer than the plain sheet that the latter is drawn out, making itperfectly smooth when the rivets are tight ened.

To keep out the rain and moisture of the atmosphere from between theplates A B, and prevent the rusting of the same, it is deemed necessaryto close the openings at both top and bottom formed by the corrugationsin the plate A, and this is accomplished by turning a flange, 1), uponthe lower edge of the flat plate B of sufficient width to cover theopenings, while the openings in the upper end are closed by riveting orotherwise securing to the plate B an angle-bar, 0.

It will be seen that the openings are tightly sealed, confining the airtherein, and making a better non-conductor of heat than if they are leftopen, and in case of a fire surrounding the shutter, if left open, thechambers or openings formed by the corrugations would act as flues, and,consequently, increase the heat passing through them. The plate B isalso formed with a single corrugation, d, at its outer edge, running theentire length of the plate, so that when making two shutters for oneopening the left-hand shutter will lap over the other, making a tighterand firmer joint or lap when closed, and also greatly adding to thestrength of the plate.

Having now fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

1. As a new article of manufacture, a metallic shutter composed of acorrugated plate,

A, and flat plate B, rigidly connected together I by parallel rows ofrivets, as specified, the openings formed by the corrugations beingclosed at both top and bottom, substantially as and for the purpose setforth.

2. The shutter herein described, consisting GEORGE F. KISSAM.

Witnesses:

J. S. MoOLURE, WM. H. CLARKSON.

